<!DOCTYPE html>
<html>

<head>
	<meta charset="UTF-8" />
	<title>姓名案例_计算属性实现</title>
	<!-- 引入Vue -->
	<script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
	<!-- 准备好一个容器-->
	<div id="root">
		姓：<input type="text" v-model="firstName"> <br /><br />
		名：<input type="text" v-model="lastName"> <br /><br />
		全名：<span>{{fullName}}</span> <br /><br />
	</div>
</body>

<script type="text/javascript">
	Vue.config.productionTip = false //阻止 vue 在启动时生成生产提示。

	const vm = new Vue({
		el: '#root',
		data: {
			firstName: '张',
			lastName: '三',
		},
		computed: {
			//完整写法
			/* fullName:{
				get(){
					console.log('get被调用了')
					return this.firstName + '-' + this.lastName
				},
				set(value){
					console.log('set',value)
					const arr = value.split('-')
					this.firstName = arr[0]
					this.lastName = arr[1]
				}
			} */
			//简写 只读取不修改
			fullName() {
				console.log('get被调用了')
				return this.firstName + '-' + this.lastName
			}
		}
	})

	console.log(vm);
</script>

</html>